Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 150gr | Woodleigh PP SN bullet and 79 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Vihtavuori N560 and Norma MRP.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 54,607 psi | 86% | 2920 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 55,912 psi | 88% | 2953 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 56,101 psi | 88% | 3077 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 94% | 57,116 psi | 90% | 3081 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 82% | 56,840 psi | 89% | 2907 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,724 psi | 89% | 3015 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 94% | 54,433 psi | 85% | 3018 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,878 psi | 77% | 2913 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,540 psi | 68% | 2874 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 56,855 psi | 89% | 3009 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 56,855 psi | 89% | 3009 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 88% | 56,739 psi | 89% | 3009 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,070 psi | 85% | 2966 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,144 psi | 88% | 3002 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,462 psi | 85% | 3015 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,521 psi | 87% | 2982 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,795 psi | 86% | 3045 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,202 psi | 88% | 3077 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,202 psi | 88% | 2976 fps | 96.7% |
| Bofors RP15 | <<locked>> | 98% | 57,058 psi | 89% | 3054 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,879 psi | 80% | 2986 fps | 98.9% |
| Bofors RP5 | <<locked>> | 94% | 54,462 psi | 85% | 3015 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 54,839 psi | 86% | 2900 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,896 psi | 84% | 3005 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 84% | 54,099 psi | 85% | 2956 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 56,681 psi | 89% | 2966 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 54,346 psi | 85% | 2953 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,043 psi | 89% | 2995 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,217 psi | 90% | 2930 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,853 psi | 84% | 3120 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 54,230 psi | 85% | 2989 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,188 psi | 58% | 1844 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,434 psi | 88% | 2940 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,333 psi | 88% | 2923 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 56,289 psi | 88% | 2943 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,535 psi | 87% | 2940 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 96% | 56,115 psi | 88% | 3058 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 57,014 psi | 89% | 2923 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,085 psi | 86% | 2920 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,680 psi | 87% | 2936 fps | 100% |
| Norma 204 | <<locked>> | 88% | 57,537 psi | 90% | 2999 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 39,146 psi | 61% | 2802 fps | 98.2% |
| Norma MRP | <<locked>> | 92% | 54,288 psi | 85% | 3038 fps | 100% |
| Norma URP | <<locked>> | 86% | 54,447 psi | 85% | 2936 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,956 psi | 89% | 3077 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 88% | 56,956 psi | 89% | 2999 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,216 psi | 87% | 3009 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,913 psi | 59% | 1886 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 57,580 psi | 90% | 3005 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 55,869 psi | 88% | 2976 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,288 psi | 85% | 3009 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,433 psi | 85% | 3117 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,298 psi | 77% | 2999 fps | 97.4% |
| Rottweil R 903 | <<locked>> | 82% | 56,202 psi | 88% | 2897 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,375 psi | 85% | 2923 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 92% | 55,854 psi | 88% | 2992 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 54,839 psi | 86% | 2900 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,014 psi | 89% | 2923 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,085 psi | 86% | 2920 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 57,551 psi | 90% | 2956 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,854 psi | 88% | 2762 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,246 psi | 88% | 2874 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,419 psi | 87% | 2989 fps | 99.7% |
| Somchem S355 | <<locked>> | 82% | 55,869 psi | 88% | 2894 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,956 psi | 88% | 2920 fps | 98.5% |
| Somchem S365 | <<locked>> | 88% | 54,839 psi | 86% | 2940 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,217 psi | 88% | 2959 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 56,898 psi | 89% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,130 psi | 88% | 2927 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,854 psi | 88% | 2943 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 55,332 psi | 87% | 2933 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,331 psi | 85% | 2959 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,172 psi | 85% | 3031 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 98% | 53,983 psi | 85% | 3012 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,618 psi | 79% | 3005 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,637 psi | 87% | 2884 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,099 psi | 85% | 2956 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 57,145 psi | 90% | 3123 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,275 psi | 88% | 2959 fps | 99.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 34,055 psi | 53% | 2533 fps | 97.7% |
| Accurate 4350 | <<locked>> | 80% | 45,614 psi | 71% | 2785 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 39,436 psi | 62% | 2756 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 86% | 42,873 psi | 67% | 2822 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 53,490 psi | 84% | 2858 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,029 psi | 60% | 2657 fps | 96.3% |
| ADI AR 2213 | <<locked>> | 84% | 38,870 psi | 61% | 2707 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 94% | 39,958 psi | 63% | 2726 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 90% | 31,502 psi | 49% | 2566 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,406 psi | 60% | 2661 fps | 96.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,406 psi | 60% | 2661 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,714 psi | 69% | 2795 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,488 psi | 79% | 2913 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,058 psi | 60% | 2654 fps | 96.3% |
| Alliant Reloder-22 | <<locked>> | 82% | 36,318 psi | 57% | 2657 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,634 psi | 51% | 2562 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,456 psi | 45% | 2467 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,607 psi | 56% | 2700 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 49,864 psi | 78% | 2861 fps | 95.2% |
| Bofors RP15 | <<locked>> | 84% | 36,027 psi | 56% | 2648 fps | 95.6% |
| Bofors RP30 | <<locked>> | 90% | 36,245 psi | 57% | 2684 fps | 95% |
| Bofors RP5 | <<locked>> | 82% | 36,318 psi | 57% | 2657 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 48,312 psi | 76% | 2789 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 90% | 38,305 psi | 60% | 2694 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 47,398 psi | 74% | 2841 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 49,792 psi | 78% | 2851 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 41,568 psi | 65% | 2717 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 84% | 40,756 psi | 64% | 2700 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,176 psi | 65% | 2674 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 33,910 psi | 53% | 2671 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 46,891 psi | 73% | 2864 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,702 psi | 43% | 1644 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,758 psi | 69% | 2720 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,763 psi | 78% | 2815 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 43,511 psi | 68% | 2736 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 40,567 psi | 64% | 2657 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 86% | 39,987 psi | 63% | 2746 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 47,224 psi | 74% | 2762 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 45,542 psi | 71% | 2753 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 29,443 psi | 46% | 2411 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 43,772 psi | 69% | 2762 fps | 97.7% |
| Norma 217 | <<locked>> | 94% | 32,010 psi | 50% | 2615 fps | 95.4% |
| Norma MRP | 57.1 gr | 80% | 35,433 psi | 56% | 2664 fps | 97.1% |
| Norma URP | <<locked>> | 80% | 44,715 psi | 70% | 2772 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 39,668 psi | 62% | 2753 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 43,598 psi | 68% | 2772 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 32,822 psi | 51% | 2566 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,398 psi | 45% | 1686 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,635 psi | 84% | 2953 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,469 psi | 71% | 2805 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,772 psi | 69% | 2828 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 30,705 psi | 48% | 2572 fps | 95% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 42,366 psi | 66% | 2858 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 52,576 psi | 82% | 2848 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,552 psi | 62% | 2641 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 37,376 psi | 59% | 2641 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 80% | 48,312 psi | 76% | 2789 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,224 psi | 74% | 2762 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 45,542 psi | 71% | 2753 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,925 psi | 85% | 2904 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,765 psi | 83% | 2720 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,195 psi | 72% | 2710 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,086 psi | 58% | 2635 fps | 96.2% |
| Somchem S355 | <<locked>> | 80% | 52,330 psi | 82% | 2841 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 42,960 psi | 67% | 2690 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 41,684 psi | 65% | 2730 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,971 psi | 60% | 2625 fps | 97.3% |
| Vihtavuori N150 | <<locked>> | 80% | 50,096 psi | 79% | 2762 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,151 psi | 72% | 2766 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 32,851 psi | 51% | 2493 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 45,556 psi | 71% | 2772 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,767 psi | 58% | 2641 fps | 99.7% |
| Vihtavuori N560 | 60 gr | 84% | 41,104 psi | 64% | 2782 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 90% | 41,002 psi | 64% | 2766 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 96% | 43,888 psi | 69% | 2871 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,281 psi | 71% | 2726 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,398 psi | 74% | 2841 fps | 99.5% |
| Winchester StaBALL HD | 56.5 gr | 80% | 29,022 psi | 45% | 2579 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 34,679 psi | 54% | 2546 fps | 95.1% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 79 powders for .270 Weath. Mag. loaded with the .277 | 150gr | Woodleigh PP SN. Winchester StaBALL HD delivers the highest muzzle velocity at 3,123 fps; across all powders the maximum-charge window runs from 1,844 fps to 3,123 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.277" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Winchester StaBALL HD, Vihtavuori N560, Norma MRP rank at the top here: for .270 Weath. Mag. with the .277 | 150gr | Woodleigh PP SN they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.